ES2283792T3 - SHOPPING CART. - Google Patents

Abstract

A shopping trolley, which includes a holder for holding articles of shopping, and a wheeled undercarriage connected to the holder. The undercarriage is operable between an erected condition, in which the undercarriage supports the holder at a working height above the ground on wheels, and a collapsed compact condition, for loading of the trolley into a boot of a passenger sedan so that the holder provides a boot organizer. In one embodiment of the invention, the undercarriage comprises a pair of telescopically extendable curved legs, which have wheels mounted thereon. A vehicle, which has a securing arrangement in its boot specifically for securing the collapsible shopping trolley in a stable condition in the boot, when the undercarriage of the trolley is collapsed.

Description

Shopping cart.

The invention relates to shopping carts. The invention also relates to a vehicle set comprising the car of the Purchase and a vehicle.

EP0286 620 presents a car of the purchase that can be folded and whose dimensions allow storage the car folded in the trunk of a vehicle, although you can straighten to serve as a shopping cart of adequate size. He WO 99/06289 presents a transport system, which it comprises a mobile transport device, such as a car of the purchase, which is carried in a larger vehicle, where the vehicle It presents means that allow the device to be carried transport.

According to a first aspect of the invention, offers a shopping cart that includes:

a receptacle that contains the items that are have bought and a chassis with wheels connected to the receptacle, chassis that can be used between a mounted position, in which the chassis supports the receptacle at a height of use, above from the ground and on wheels, and a compact, folded position, to load the car in the trunk of a tourist,

characterized by

the chassis comprising a pair of legs curved, elongated, partially shaped circular;

a set of wheels mounted on the pair of legs; Y

each leg is mounted, so that you can slide over an associated frame element so that each leg can move, sliding, between an extended position in which the leg protrudes from the associated frame element to support on the ground the wheels mounted on said leg, being arranged the leg more or less end against end with the frame element associated, and a retracted position in which the leg is retracted with respect to the associated frame element.

It will be appreciated that the shopping cart is intended to be used with a vehicle and that the vehicle and the Shopping cart will have ways that allow your cooperation reciprocal, particularly during storage during storage of the shopping cart in the trunk of the car, when the car is in its stowed position. The car of the purchase can therefore be seen primarily as a vehicle accessory.

One of the characteristics of the car, in its folded position, it can fit inside the trunk of a medium-sized tourism, functioning as a divisor or organizer of trunk. Therefore, when it is in the folded position and rests on the bottom of the trunk of a vehicle, the car it can have a length of 0.5-0.9 m, of preference 0.5-0.8 m, from a height of 0.3-0.5m, preferably 0.4-0.5m and a width of 0.3-0.6 m, preferably 0.4-0.5 m.

The shopping cart can rest on the bottom of the trunk of a vehicle, when the chassis is in its folded position, so that the receptacle has a vertical orientation similar to the orientation of the receptacle when the chassis is in the extended position and supports the receptacle on the ground, so that the receptacle It constitutes a trunk organizer. Usually the receptacle is a shopping-tray basket that look up when the car is folded and rests on the trunk, but the receptacle can consist of any other provision to contain purchased items, for example a plurality of shopping bags. The term receptacle is not refers only to a basket, tray, bag or other container to contain purchase items but also to a provision or training to contain a basket, tray or bag with items of the purchase.

The distance between the receptacle and the ground surface, when the chassis is in position mounted will be chosen so that you can access the receptacle a person of medium height in normal posture, that is to say that he has a normal carriage height, the separation being greater than 0.4 m, from preference 0.45-0.6 m. Conveniently, the distance between the receptacle and the floor surface, when the chassis is in mounted position, it is variable. The receptacle define a storage space that can be divided conveniently in a certain number of compartments. In a preferred embodiment, the shopping cart may comprise certain number of durable shopping bags, which can be accommodate in the storage space of the receptacle, forming the bags a permanent part of the accessory, being able to remove of the receptacle and being intended for repeated uses. This is opposes disposable shopping bags, more or less conventional, based on plastic material, sheet-shaped, thin and flexible wall. The bags can therefore be of woven or natural material flexible plastic textile material tissue.

The bags can be of material practically impervious to liquids.

In a particular embodiment of the invention, at least some of the bags are divided into cameras separated. At least one of the bags can carry a insulation that provides storage chambers with thermal isolation. Some of the bags may be padded to avoid damage, when used, of fragile items such as glass items, stored in storage chambers. In addition, partitions can be arranged, which separate the cameras from respective storage with each other, with reinforcements to prevent certain items, such as delicate fruit, stored in Storage cameras Each bag can have a mechanism closure, for example a zipper to close and open the bags, which are liquid tight when they are closed.

The chassis will have a set of wheels, such as rollers, which are attached to the support surface for provide mobility to the chassis. In a preferred embodiment, the roller assembly comprises a four wheel assembly arranged in rectangular shaped in a plan view, when the chassis is in mounted position, being able to rotate freely each roller around a vertical axis of rotation associated. The chassis can be strong enough to withstand a load of at least 50 kg. in the receptacle when The chassis is in the mounted position.

Each leg can be telescopically housed in the associated frame element, being able to slide telescopically between the extended position and its position retracted, so that, in the stowed position, each leg is located within the associated frame element and each frame of associated element may have partially circular shape corresponding to the shape of the legs, to allow telescopic sliding of the legs in a circumferential direction. The legs and frame elements may be non-circular, for Usually rectangular cross section, to reduce the angular displacement of the legs around their directions Longitudinal within the associated frame elements.

Conveniently, each leg can have mounted on it a movable handle, so that when the leg is in extended position, the associated handle is found near the rear of the car, in the sense of front to back, for a user to grab, and each handle can be moved, so that it can pivot, respect of the associated frame element, around an axis of rotation that is extends transversely in the direction from front to back of carriage in mounted position, so that when the leg is in the stowed position, the handle can move, so that can pivot around its axis of rotation towards the element of associated frame to be placed near the frame element. Every handle can conveniently present a curvature, with a radius of curvature similar to that of the frame elements, so that when the handle is close to the associated frame element, girdle the frame element curve.

To allow sliding scrolling of each leg in the associated frame element, the frame element it will be usually tubular, presenting a slot that extends longitudinally, through which some can stand out Mounting formations on the leg to mount the wheels and / or the handles and along which they can slide assembly formations by telescopically shifting the leg to frame element length.

Each leg can therefore be mounted on the same a pair of wheels spaced longitudinally by the leg and each wheel can be separated from the associated leg by one foot elongated, connected so that it can pivot at one end of the same with the leg to move around an axis of turn that extends transversely to the forward direction towards behind the shopping cart, the associated wheel being arranged at the opposite end of the foot and being able to move, so that can pivot, each foot between a mounted position in which it found next to the associated leg, and a position of use, in the which protrudes transversely from the associated leg, so that the associated wheel is separated from said leg a length equal to foot that contacts the ground.

Each partially circular leg and its element of associated partially circular frame can rest, the chassis in mounted position, in a more or less vertical plane and define a gap between its ends in a front part of the car in the front-to-back direction of the shopping cart, being said gap large enough to encompass the rear of an open trunk of a tourist when moving the car of the purchase to the trunk of the vehicle, during use, of way that part of the legs can be accommodated in a space between the ground and the rear of the vehicle, coupling the frame elements with the back of the vehicle, to rest there. This facilitates the folding of the chassis by telescopic folding of the legs, while the rest of the car Rest on the vehicle.

Usually, the radius of curvature of the legs and frame elements is 0.3 m-0.5 m, preferably about 0.4 mm.

Conveniently, the shopping cart can a auxiliary receptacle to contain purchase items, receptacle auxiliary that can be connected, so that it can be removed and replace, to the legs to extend between the legs when they are in their extended positions, also serving the receptacle reinforcing crossbar auxiliary between the legs to enhance the lateral stability of the chassis.

The pair of frame elements can be conveniently movable between each other, between a position of use, in which the frame elements rest in parallel planes, laterally spaced transversely to the direction of front to back of the shopping cart, a sufficient distance to allow temporary storage of purchase items in a defined space between the frame elements, and a position fully retracted in which the frame elements are placed more or less flat against each other. It will be possible appreciate that the receptacle is usually found among the elements of the frame and the carriage cannot therefore be used as a divider or boot organizer when in position fully folded

Advantageously the car can comprise a pair of auxiliary wheels, mounted respectively on the ends adjacent frame elements in the forward direction back of the car, so that the auxiliary wheels can be attached to the ground when the extendable legs are they are in their stowed position and one end of the car opposite to the auxiliary wheels is grabbed by a user, to allow the use of the car as if it were a truck.

The elements of the frame and legs can be of polymeric plastic material, where each component is a piece of integral molding. On the contrary, the components can be of extruded material such as steel, aluminum or titanium or they may be constituted by a fiber material composed as fiber of carbon or KEVLAR.

According to a second aspect of the invention, It presents a vehicle assembly that includes:

- A shopping cart according to the first aspect and a vehicle comprising a body that defines a trunk, boot that has a fixing device specifically for fix the shopping cart in a stable position in the trunk during normal vehicle operation, resting the car of the purchase, with its chassis in a stowed position, on the floor of the trunk of the vehicle, and fixed in a stable position by of the fixing device that fixes the shopping cart of such so that the carriage receptacle has an orientation relative to the vertical similar to its orientation when the car chassis the purchase is in its mounted position and the receptacle is supported by soil.

The fixing device may comprise a depression on the floor of the trunk to receive the car from the buy with your chassis in stowed position, having depression a complementary profile of the lower part of the carriage of the Buy in your stowed position. On the contrary, or in addition, the fixing device may comprise fasteners such as straps, to hold the car in position in the trunk.

The rear of the vehicle and the car of the purchase are configured to cooperate so that the car, when its legs are extended, it can encompass / encabalgar the rear of the vehicle when a cover of the vehicle is open trunk, to facilitate folding and assembly of the chassis.

The invention is now described, by way of for example, with reference to the accompanying schematic drawings, in those who:

- Figure 1 is a schematic elevation view side of an example of a shopping cart, meeting the shopping cart chassis in mounted position;

- Figure 2 is a view corresponding to the Figure 1, where the chassis is in the stowed position;

- Figure 3 is an elevation view and schematic of a shopping cart of figure 1, the chassis in stowed position.

- Figure 4 is a schematic plan view of the shopping cart of figure 1 in the trunk of a tourism;

- Figure 5 is a three-dimensional view schematic of a set-vehicle according to the invention, which comprises a vehicle and a shopping cart according to the invention;

- Figure 6 is a schematic view three-dimensional from behind a first embodiment of a car of the purchase according to the invention, with the car chassis in mounted position;

- Figure 7 is a three-dimensional view of the front of the shopping cart of figure 5;

- Figure 8 is a three-dimensional view of the shopping cart of figure 6, shown fully in position retracted Y

- Figure 9 is a side elevation view schematic of a second embodiment of a shopping cart according to the invention.

In the figures, reference number 10 is usually refers to an example of a shopping cart or vehicle accessory The shopping cart 10 comprises a receptacle in the form of a shopping cart or tray 12. The cart 10 It also comprises a chassis 14.

Tray 12 has a rectangular base 16 of the one that comes out a low side wall 18 that extends peripherally, to form a storage space 20 bit deep. Tray 12 is a molded piece of material thermoplastic

The shopping cart 10 comprises a pair of Durable bags 22, 24 (not shown in Figure 2) that are housed well in storage space 20. Bags 22, 24 form a permanent part of carriage 10, and can be removed or detached of tray 12, being provided for repeated uses. The bags 22, 24 are made of flexible woven plastic textile material. One of The bags 22 are divided into four cylindrical compartments elongated 25 of equal size, resulting in the shape and size of the 25 compartments suitable for containing cold drink bottles conventional two-liter, the direction being vertical longitudinal of the compartments 26. The walls of this bags 22 are insulated so that the bag 22 provides compartments  26 for insulated storage.

The other bag is divided into two chambers 28 of equal size Each bag has a closing mechanism in the form of zipper 30 to close and open the bags 22, 24. Both bags 22, 24 are virtually fluid tight when they are closed. It will be appreciated that the size and shape of the cameras Storage will vary from one region to another or from one country to another to adapt to user preferences in the various regions where cars are used 10.

Although the figures are not shown, each bag 22, 24 is provided with a handle for easy handling.

In another example, which constitutes an embodiment of the invention, which is not illustrated, the storage space 20 of tray 12 is divided into compartments, so that the carriage of purchase 10 does not include bags 22, 24. When you leave use, purchase items can be stored directly in these compartments of tray 12.

The chassis 14 can pass from a mounted position (figure 1) in which the chassis supports tray 12 at a height of use above ground 22 on a set of wheels 34, and a stowed position (figures 2 and 3), in which carriage 10 is compact enough to fit in boot 50 (figure 5) of a tourism 52. In mounted position (figure 1), the chassis 14 supports therefore the tray 12 at the usual height of the carriage of the purchase, that is to say approximately 0.5 m or more from the 32 floor, and the storage space 20 of tray 12 is directed and is open up.

The chassis 14 comprises two movable halves independently 58, each of which comprises a framework of U-shaped handle 38 and a pair of wheel holders 40, each frame of the handle 38 being able to move, so that can rotate, relative to the associated wheel support 40 around a pivot shaft 42, parallel to the base 16 of the tray 12, and which normally extends in the front to back direction of the carriage 10. With the chassis 14 in the assembled position, the frames of the handle 34 are separated, so that they can pivot, of the brackets 40 of the associated wheel while in position folded, each handle frame 38, rests firmly against the associated wheel supports 40. It will be appreciated that although each handle frame 38 is aligned with an opposite pair of wheel stands 40 when the chassis is in position mounted (figure 1), this alignment is a coincidence and the handle frames 38 and wheel holders 40 may be misaligned.

In mounted position, each handle frame 38 forms a handle 44 to facilitate the thrust of the carriage of the purchase 10. Although not shown in detail, each wheel 34 has wheel shape that can rotate freely around an axis of vertical rotation, so that carriage 10 can be pushed with equal ease from any end of the car 10. Like halves 38 of the chassis 14 can be folded independently, the carriage purchase 10 can be used as a wheelbarrow when one of the halves 36 is mounted and the other half 38 is folded. He chassis 14 presents a locking mechanism (not shown) for the independent lock of each half 38 in mounted position or retracted, to allow the chassis lock in format wheelbarrow. In a development of the invention, the mechanism of lock can be operated by means of push buttons located in each of the frames of the handle 38. In addition, as it can be seen in figure 2, when carriage 10 is in its stowed position, wheels 34 protrude from the rest of the chassis 14 a sufficient distance to allow the operation of the car as if it were a truck, when chassis 14 is completely retracted.

Figure 4 shows a part of the floor 46 of the trunk 50 of tourism 52, where the shopping cart 10 rests on the floor 48 in a stowed position. As you can see in the Figures 4 and 5, the floor 45 has a strengthening formation in form of depression 48 of complementary profile to the lower face of the shopping cart 10 in its stowed position, so that the shopping cart 10 is perfectly accommodated in this depression 48. The shopping cart 10 is maintained and therefore placed in stable position in boot 50 during normal operation of vehicle 52.

When used, the shopping cart 10 will be stored in the trunk 80 of the vehicle 52 during the normal operation of vehicle 52, carriage 10 being kept in stable position by means of depression 48 on the floor 46 of the trunk 50. In this position, the shopping cart 10 serves as trunk divider or organizer, offering a certain number of compartments 26, 28 for storing goods in a manner stable.

When a user (not shown) enters a shop to make your purchases, the shopping cart 10 is taken out of the trunk and the chassis 14 moves to its mounted position, moving so that it can pivot, the handle frames 38 and moving them away from the supports 40 of the wheel, blocking automatically the chassis 14 in its mounted position. The car of the purchase 10 is then used similarly to cars conventional, pushing car 10 to a store where buy the desired items, driving car 10 between the aisles of the store and placing in tray 12 the Items you want to buy. Once the items have been checked of the purchase in the usual way, they are placed in the bags 22, 24 from tray 12 and the carriage 10 is brought back to the vehicle 52. Then, the chassis 14 and the shopping cart 10 are folded, with items purchased still in bags 22, 24 of the tray 4, is placed in the trunk. Naturally, the items that are They want to keep cold placed in the isolated 26 chambers.

It is envisioned that chassis 14 can be constructed so that it folds automatically upon entering contact with the boot 50 of the vehicle 52. For this, it is expected it may be necessary to build the rear end of the vehicle 52 specifically to constitute a place of download of this shopping cart that folds automatically, when a boot lid 50 is opened. This unloading place can comprise a roller mounted so that it can rotate on the vehicle, to facilitate the sliding of the car towards the trunk interior 50.

The user can then return by car to his home since the car 10 remains stable in the boot 50, such as described above. Once at home, the user has the option of removing the car 10 from the trunk, lifting the chassis 14 and pushing the carriage 10 to the desired place or the user You can remove the bags 22, 24 and take them to the place you want.

In Figures 6-8, the number 60 generally refers to a first carriage embodiment of the purchase according to the invention, and the part numbers are correspond to those in figures 1-5 and figures 6-8. Shopping cart 60 works so similar to shopping cart 10 in figure 1 but it has a different construction and therefore can be retracted and Spread differently.

The shopping cart 60 has two elements of semicircular frame 62 or in general arc-shaped resting in parallel planes that are transversely spaced, being said planes parallel to the direction from front to back of the car 60. An arc 64 of each frame element 62 is a hollow tube that It has a rectangular cross section. The ends of each arc 64 are connected to each other by means of a stud 66 for greater rigidity

An elongated and curved leg (68) is housed in each frame element 62, the leg 68 having a radius of curvature equal to arc 64 of associated frame element 62, and a slightly smaller rectangular cross section of so that each leg 68 can slide telescopically in direction longitudinal in the associated arc 64. Each leg 68 can slide therefore between a retracted position (figure 8) in which the leg 68 is fully housed within arc 64, and a position extended (figures 6 and 7) in which leg 68 protrudes from the element of frame 62, being arranged more or less end to end with the associated arc 64. Although not shown, carriage 60 has a automatic locking mechanism to lock automatically legs 68 in their extended positions.

Each leg 68 has two mounted on it wheels 70 and a handle 72, the respective wheels 70 and the handle 72 spaced along the leg 68. How can you see in figures 6 and 8, each of wheels 70 and the handles 72 are mounted on the associated leg 64 by means of a mounting formation in the form of mounting plate 74 which protrudes transversely behind leg 68 of the element of associated frame 62, ie radially of leg 68. Each arc 64 it has a groove 76 that extends longitudinally in a wall radially outside thereof, so that the mounting plates 74 of each leg 68 can slide longitudinally along of the associated slot 76 after telescopic folding or extension of leg 68.

Therefore, when one of the legs 68 is fully extended (figure 8), the pair of wheels 70 mounted on it, it protrudes down from the body of the car 60 which provide the elements of the frame 62, so that the legs together form a chassis 14 to support the frame elements 62 on the ground, on wheels 70. In this position, the handles 72 are located at a rear portion 78 of the carriage 60 in the direction from front to back of it, so that a user can grab and push the carriage 60. However, if the legs 68 they are in the stowed position (figure 8) the wheels are operatively located above the arches 64, being placed the handles 72 next to a front part 80 of the frame element 82, opposite the rear of the car 60.

Each handle 72 is mounted so that can pivot on its associated mounting plate 74 to rotate in around a rotation axis 82 that extends in a normal direction to front-to-rear direction of carriage 60. Each handle 72 can therefore be moved between an operating position (Figures 6 and 7) in which it protrudes transversely, more or less radially of the frame element 82 so that it can be grasped by a user, and a saved position (figure 8) in which the handle 72 rests next to the arch 74 of the frame element associated 62, extending circumferentially. How I know you can see in figure 8, the handles 72 are curved so similar to the elements of the frame 62, so that in its position saved, each handle 72 embraces the curve of the associated arc 64; In this example, each handle 72 has approximately 0.4 m of length. Although not shown in the figures, each handle 72 it is provided with an associated automatic locking mechanism for Lock it automatically in its position of use. In others embodiments of the invention, each handle can have a handle protruding transversely from a main part elongated curved of the handle, the handle being located in a end of the handle away from its rotation connection to the leg associated 68, protruding and moving away from the frame element 62

Similarly, each wheel 70 is mounted on the associated mounting plate 74 by means of an elongated foot 84. Each foot 84 can be moved, so that it can pivot with respect to the associated mounting plate 74 around an axis of associated turn 85 extending in a direction normal to the front to back direction of carriage 60. Each foot 84 can be therefore move between a position of use (figures 6 and 7) in which it protrudes transversely, that is radially, moving away from the associated leg 68 to engage the ground and a stored position in which it pivots towards the frame element associated 82 to rest adjacent and more or less parallel to a corresponding part of an associated arc 64, extending from more or less circumferential shape. As you can see in the figure 6, the feet 84 of each leg 68 pivot in opposite directions toward  its stored position, towards each other so that no part of the leg 68, the wheels 70 or the handle 72 protrudes in circumferential direction beyond the ends of arc 64 of associated frame element 62. Although not shown in the figures, each foot 84 is provided with an automatic locking mechanism associated for automatic locking in its position of use. Each wheel 70 is a multidirectional ball mounted on one end. of the associated foot 84 opposite the axis of rotation 86 of said foot 84, for provide multidirectional movement to carriage 60.

The radius of curvature of the arch 64 and the legs 68 It is approximately 0.4 m and the length of each foot is approximately 150 mm The length of the uprights 56 is therefore both 0.8 m. Therefore, when mounted, the height of the upper faces of the arches 64 with respect to the ground is of approximately 0.95 m, while the height of the uprights 66, that define the height that separate the bags 22, 24 from the ground is  approximately 0.55. In folded state, height and length of the car 60 are respectively somewhat higher than 0.4 m.

Each frame element 62 comprises a panel lateral 88 blocking a semicircular opening defined by said frame element 62. Each side panel 88 also has a narrow tray 90, which extends longitudinally, laterally separated from frame element 62 to receive several items like pens, pens or notebooks.

When carriage 60 is in the mounted position, it is say when both legs 68 are in their extended positions, it defines a gap between the distal ends of the legs 85 and the ends of the arches 64 in the front part 80 of the carriage 60, of such that car 60 is in the shape of a letter "a" when  view from the side (where it is best seen is in figure 9).

A defined storage space between frame elements 62 houses a pair of flexible cloth bags 22, 24, similar to those described with reference to Figure 1, 4; sayings bags 22, 24 are configured so that the upper sides they follow the curvature of the elements of the frame 62. Bags 22, 24 can be removed and replaced, similar to the construction defined with reference to the figures 1-4. The elements of the framework 62 define both together a receptacle to contain purchase items, through the bags 22, 24. The upper parts of the bags 22, 24 have a generally curved shape, to follow the curvature of arcs 64, but bags 22, 24 may extend vertically to receive items that overflow, provided if necessary, similar to a pair of bags 102 of the figure 9.

The elements of the frame 62 can be moved laterally to each other, and are connected together by a couple of folding uprights 92, which extend laterally, and one of the uprights 92 is located at the front 80 of the carriage 60 and the other upright 92 is located at the rear 78 of the car 60. The elements of the frame 62 can therefore be displaced between a fully retracted position of car 60, in which the uprights 92 are folded, that is, articulated, of so that the parallel sides on which the elements of frame 62 are located next to each other, and a position mounted / raised in which the frame elements 62 are sufficiently spaced transversely to receive the bags 22, 24 in expanded state. The fully retracted position of the car 60 is shown in figure 8, where the bags have been removed 22, 24 and side panels 88 for ease of illustration. Be you will appreciate that the bags 22, 24 can really be removed and can be removed to facilitate easy folding of the elements of frame 62. Each side post 92 is approximately 0.4 m in length when extended.

The carriage 60 comprises an auxiliary receptacle in tray shape 94 disposed between legs 68 when found in extended position (figures 6 and 7). Tray 94 is can be removed and replaced and is intended to store merchandise to bulk. In the example shown in Figures 6 and 7, tray 94 comprises a flexible canvas base 96 extended between two crossbars (not shown in figures 6 and 7 but indicated schematically in figure 9 with reference number 96), and the crossbars 96 are connected to both legs 68 to extend  transversely between them. The crossbars 96 work by therefore as stabilizers to enhance the lateral stiffness of the car 60 in its raised position.

During use, carriage 60 is used similar to carriage 10 described with reference to the figures 1-5. During normal use, carriage 60 is placed in the trunk of a vehicle in a semi-folded position (not shown). The semi-retracted position corresponds to the position entirely retracted shown in figure 8, with the difference that lateral uprights 92 are extended so that the elements of frame 62 are sufficiently spaced laterally so that the bags 22, 24 expand. In this position, the uprights 66 of the frame element 62 provide a stable base on the which rests support 80 on the floor of the trunk, so that car 60 functions as a divider or trunk organizer. In this position, the removable tray 94 comprising the pair of crossbars 96 and the canvas are folded and stored in the tray side 90 provided by one of the side panels 88. The car 60 is stored in the vehicle so that the address of front to back of carriage 60 is aligned with the direction of front to back of the vehicle.

When carriage 60 has to be removed from trunk, in the store or at home, the user grabs the arches 64 of the frame elements 62 and pulls the carriage 60 towards one end open the trunk, so that the back 78 of the car 60 protrudes beyond the rear of the vehicle, being the frame elements 62 still resting on the trunk vehicle. The user then extends his hand, grabs the handles 72 and pull them towards the open end of the trunk, to slide legs 68 along the arches 64, therefore telescopically extending the legs 68. The legs 68 therefore move circumferentially around to the rear of the vehicle, such that the legs 68 protrude below the vehicle causing the 70 wheels to enter in contact with the ground, and the hole formed in the front 80 of car 60 covers / encases the rear of the vehicle. The handles 72 pivot away from the frame elements. 62 and automatically lock in position, after which Remove car 60 from the trunk of the vehicle and use it for purchase in the manner described above with reference to cart 10 of figures 1-5. After finishing the purchases, the process is reversed, to place the car 60 in the trunk in its semi-folded position, in other words, the car 60 is rolling towards the trunk of the vehicle (which is open) so that the gap in the front 80 of the car 60 covers / encases the rear of the vehicle, resting the frame elements 62 in the trunk, after which they fold telescopic legs 68 in the associated arches 64. In a development of the invention, it is envisioned that the extension and / or folding of the legs 68 can be automated by activating example by means of a hydraulic drive device, pneumatic or electromechanical Said drive device it can be connected for example to a standard battery of the vehicle.

If more space is needed in the trunk, and no no trunk organizer is needed, car 60 can be remove from your complementary depression (not shown) on the floor of the trunk and side uprights 92 fold to move the frame elements towards a completely compact position retracted (figure 8). In this fully retracted position, the car occupies less space than in semi-folded position.

In figure 9 the reference number 100 usually indicates another embodiment of a shopping cart according to the invention, and in figures 6-8 and in the Figure 9 Equal parts bear the same reference number. The shopping cart 100 works very similarly to the shopping cart purchase 60 of Figures 6-8, indicating Then the main differences.

The shopping cart 100 has a pair of bags 102 that have transparent plastic walls and rigid bases, tray type. Although not shown in the figures, the bags 102 have multipurpose divided compartments and type closures hook and loop to close the different covers of the compartments defined by bags 102. Each bag 102 has also a rigid handle for easy removal and handling of the bag 102.

The carriage 100 also has a wheel auxiliary 104 at one end of the pillar 66 of each element of frame 62 on the front 80 of the carriage 100. The auxiliary wheel 104 can be extended so that it protrudes operatively towards below the associated frame element 62, to allow use of car 100 as if it were a truck when found in semi-retracted position, that is when the legs 68 are retracted, when the user grabs the back 78 of car 100. The auxiliary wheel 104 is shown in position extended in shadow lines in figure 9, and is mounted on a small leg that allows you to climb stairs with the car 100 when the user drags the car 100 as if it were a wheelbarrow. Although not shown in the figures, the side post 92 at the back 78 of the car 100 has openings that allow you to grab the car 100 while using it as if it were a wheelbarrow.

Figure 9 also shows openings of handle 106 on the mounting plates 74 of the handles 72, for facilitate the movement of legs 68 during extension or the retraction of the legs 68. The handle 72 is provided then of a push button 108 to unlock the handle 72 when in use position.

The car 100 is also provided with strips of base 112 extending below the surfaces of the uprights 66 of the frame elements 62, said strips being base 112 of a material that has a coefficient of friction reduced as the TEFLON, to facilitate the sliding of the car 100 inside the trunk of the vehicle, and also protect the vehicle of possible damage during said movement of glide. The elements of the frame 62 and the legs 68 are of molded thermoplastic polymer material.

An additional feature of the car of the Figure 9 is that it presents advertising material on the surface side directed towards the outside of the side panel 88.

One of the advantages of the shopping cart 60, 100 as described with reference to the figures is that it allows the proper transport of purchase items from a point of purchase to the user's address. In contrast to the methods Conventional purchase, it is not necessary for the user to find a shopping cart that works in the store, packs the items purchased in thin-walled flexible plastic bags in the box, load these shopping bags in the trunk of the vehicle, unload the bags from the trunk of the vehicle and carry them to the desired place Therefore, at least the stage is eliminated of downloading the shopping bags from a shopping cart conventional to load them in the trunk of the vehicle and, if the 60, 100 shopping cart is used to transport the items purchased from the vehicle to the desired location, are it also eliminates the stage of unloading the shopping bags from the trunk of the vehicle.

The embodiments of car 60, 100 of the Figures 6-9 present the additional advantage that the assembly and refolding of the car 60, 100 are facilitated by the partial support of the car 60, 100 in the vehicle during said assembly or retracted.

Repeated use of durable bags 22, 24 it will be a relief from the environmental impact of shopping bags Conventional based thin plastic sheet material.

The car 60, 100 also provides a shape adequate to transport items from home to the store, for example empty bottles that have to be returned. If you are going to make little purchase, the user has the option to remove only one of durable bags of car 60, 100, leaving car 60, 100 in the vehicle and using the bag to transport the items of purchase from the store to the vehicle, where the bag in the cart 60, 100.

Another advantage of the invention consists in of course in that while it is not used as a car of the purchase, cart 60, 100 conveniently serves as the organizer of the trunk. Also, the closing mechanism 30 of the bags 22, 24 can avoid potential damage to the occupants of a vehicle that has no separation between the trunk and the cabin of vehicle passengers, because the purchase items can get shot during an accident.

In a development of the invention, which is not Sample, an electronic computer can be mounted on an upright provided for this purpose in car 60, 100. The computer can be use to store a series of items to be purchased and the computer is expected to have an interface with a system IT from a store where the items are going to be bought, to download information regarding these items, such as by example its price and its location in the store. Naturally, the computer will be easily accessible in the car 60, 100

Tray 12 of frame elements 62 You can also carry some hooks to hang on them other bags of the purchase.

Another feature of the invention is which can easily be done based on recycled materials or recyclable and may be marked and / or present some style that fit in particular with brands and / or colors of vehicles. In the side panels 88 may in particular be material advertising or some brand.

It is also hoped that the invention can establish a link between pantry and supermarket, reducing This way the unnecessary use of disposable bags. For him Otherwise, if desired, they can be left in the trunk and bags durable can be taken from there to the supermarket in one hand and from there to the pantry of another hand.

Claims (18)

1. Shopping cart (60, 100) that understands: a receptacle that contains the items that are have bought and a chassis with wheels (14) connected to the receptacle, chassis that can be used between a position mounted, in which the chassis supports the receptacle at a height of use, above ground and on wheels, and a position compact, folded, to load the car in the trunk of a tourism, characterized by: the chassis comprising a pair of legs curved, elongated (68), which have a partially shaped circular; a set of wheels (70) mounted on the pair of legs; Y each leg is mounted, so that you can sliding, on an associated frame element (62), such that each leg can move, sliding, between a position extended in which the leg protrudes from the associated frame element to support the wheels mounted on said leg on the ground, the leg being more or less end against end with the associated frame element, and a retracted position in which the leg is folded with respect to the frame element associated. 2. Shopping cart (60; 100) according to the claim 1, which can be supported on the ground (48) of the trunk of a vehicle, when the chassis is in position folded, so that the receptacle has an orientation with respect to the vertical similar to the orientation of the receptacle when the chassis (14) is in an extended position and supports the receptacle on the floor, so that the receptacle acts as a trunk organizer. 3. Shopping cart (16; 100) according to the claim 1 or 2, wherein the distance of the receptacle from from the ground surface, when the chassis (14) is in mounted position, is such that you can access it average height person in normal position, distance being greater than 0.45 meters 4. Shopping cart (60; 100) like that of the claim 3, wherein the distance of the receptacle from the ground surface, when the chassis (14) is in mounted position is 0.45-0.5 meters. 5. Shopping cart (60; 100) as that of any of the preceding claims, wherein the receptacle defines a storage space that is divided into a certain number of compartments 6. Shopping cart (60; 100) according to the claim 5, comprising a certain number of bags of the Purchase durable (22, 24) that can be housed in the space of receptacle storage, the bags forming a part permanent fixture, which can be removed from the receptacle and They are intended for repeated use. 7. Shopping cart (60; 100) according to the claim 6, wherein the bags (22, 24) are made of textile material flexible fabric 8. Shopping cart (60; 100) according to the claim 6 or 7, wherein at least some of the bags (22, 24) It has an insulation to provide cameras thermally insulated storage. 9. Shopping cart (60; 100) according to any of claims 6 to 8 inclusive, wherein at least one of The bags (22, 24) have a closing mechanism (30) to close the bags so that they can be opened. 10. Shopping cart (60; 100) according any of the preceding claims; where the chassis (14) it has a set of four wheels (70), arranged in a rectangular configuration, in a plan view, when the chassis It is in mounted position, being able to turn freely every It rolls around an associated vertical axis of rotation. 11. Shopping cart (60; 100) according any of the preceding claims, wherein each leg (68) of the chassis (14) is telescopically housed in the frame element associated (62), and you can slide telescopically between your extended position and its retracted position, so that, in the stowed position, each leg is located inside the associated frame element, presenting each frame element a partially circular shape, corresponding to the shape of the legs, to allow telescopic sliding of the legs in circumferential direction 12. Shopping cart (60; 100) according to the claim 11, wherein each leg (68) is mounted on the same a movable handle (72) such that when the leg is in extended position, the associated handle is located near a rear (78) of the car, in the direction of front to back, so that a user can grab it, being able to move by turning, said handle with respect to the frame associated (62) around an axis of rotation (82) that extends transversely to the front-to-back direction of the car in its mounted position, so that when the leg is in the stowed position, the handle can be moved by turning, in around its axis of rotation towards the associated frame element until be near the frame element. 13. Shopping cart (60; 100) according to the claim 11 or 12, wherein each leg (68) has mounted on it a pair of wheels (70) spaced in the direction longitudinal of the leg, where each wheel is separated from the leg by an elongated foot (84) rotatably connected at one end from the same to the leg for the rotating displacement around a axis of rotation (86) extending transversely to the direction of front to back of the shopping cart, with the associated wheel at the opposite end of the foot, being able to move turning each foot between a retired position, in which found next to the associated leg, and a position of use in the protruding transversely from the associated leg, so that the distance between the associated wheel and said leg is equal to the foot length for contact with the ground. 14. Shopping cart (60; 100) according any one of claims 1 to 13 inclusive, wherein each leg (68) partially circular and its associated frame element (62) partially circular, with the chassis (14) in the mounted position, rest on a more or less vertical plane and define a gap between its ends on a front of the car in the direction of front to back of the shopping cart, being said hollow large enough to encompass a rear of a open trunk of a tourist, when the shopping cart is pushed into the trunk of the vehicle in use, so that part of the legs can be accommodated in a space between the floor and the part  rear of the vehicle, coupling the frame elements to the rear of the vehicle and resting on it. 15. Shopping cart (60; 100) according any of claims 11 to 14 inclusive, comprising an auxiliary receptacle (94) to contain the purchase, being connected the receptacle, so that it can be removed and replaced, to the legs (68) to extend between the legs when they find in their extended positions, also serving the auxiliary reinforcement cross member (96) between the legs to enhance the lateral stability of the chassis (14). 16. Shopping cart (60; 100) according any of claims 11 to 15 inclusive, wherein the pair of frame elements (62) can be shifted, the one with respect to the other, between a position of use in which the elements of the frame rest in parallel planes, separated laterally in a transverse direction from front to back of the carriage the purchase, a sufficient distance to allow storage temporarily purchase in a defined space between the elements frame, and a fully folded position, in which the frame elements rest more or less flat against each other others. 17. Shopping cart (60; 100) according any of claims 11 to 16 inclusive, comprising a pair of auxiliary wheels (104) mounted respectively on the adjacent ends of the frame elements in the sense of front to back of the car, so that the auxiliary wheels  can contact the ground when the extendable legs (68) are found in their stowed positions and one end of the car opposite to the auxiliary wheels is grabbed by a user to allow the use of the car as if it were a truck. 18. A vehicle assembly comprising: a shopping cart (60; 100) according to anyone of claims 1 to 17; Y a vehicle comprising a body that defines a trunk (50); trunk presenting a fixing device (48) specifically to fix the shopping cart and keep it stable in the boot during normal operation of the vehicle, resting the shopping cart in its chassis (14), in stowed position on the floor (46) of the trunk of the vehicle and held in a stable position by the fixing device that presents the vehicle, said device fixing the car of the purchase so that the car receptacle has an orientation with respect to the vertical similar to the orientation it adopts when the shopping cart is in a mounted position and supports the receptacle on the ground.